<template>
  <h2>toRef的使用及特点</h2>
  <h3>state:{{state}}</h3>
  <h3>age:{{age}}</h3>
  <h3>money:{{money}}</h3>
  <hr>
  <button @click="update">更新数据</button>
  <hr>
  <child :age="age" />
</template>
<script lang="ts">
import { defineComponent, reactive, ref, toRef } from 'vue'
import Child from './components/Child.vue'
export default defineComponent({
  name: 'App',
  components: {
    Child
  },
  setup () {
    const state = reactive({
      age: 5,
      money: 100
    })
    const age = toRef(state, 'age')
    const money = ref(state.money)
    console.log(age)
    console.log(money)
    const update = () => {
      state.age += 2
      age.value += 3
      money.value += 10
      console.log('test')
    }
    return {
      state,
      age,
      money,
      update
    }
  }
})
</script>
